Abstract:One-order P-SV and SH wave velocity-stress wave equation in transversely isotropic(VTI)medium is able to be used for numeric simulation of seismic wavefield with the aid of staggering grid method,which depends on the treatment of boundary condition to a very degree.Facing the issue that the absorption boundary condition of characteristic analysis method characterized by lower differential precision at boundary and poorer absorption effect,the paper presented using characteristic analysis method and boundary-enlarged attenuation method to form combined boundary condition to carry out absorption processing of manual boundary,which remarkably weakens numeric dispersion and improves differential precision;at the same time,the paper also presented the improved damping function and application principle,which is able to better simulate the propagation mechanism of wavefield in complex medium.
杜启振, 李宾. 组合吸收边界条件下VTI介质地震波场模拟[J]. 石油地球物理勘探, 2009, 44(2): 173-178.
Du Qi-zhen, Li Bin. Seismic wavefield simulation of VTI medium under combined absorption condition. OGP, 2009, 44(2): 173-178.